Hence any three-dimensional system can be reduced to a single force R acting in a certain line, together with a couple G in a plane perpendicular to the line.
A system of parallel forces can be combined two and two until they are replaced by a single resultant equal to their sum, acting in a certain line.
A group of strata having the same general lithological characters throughout may be marked by a great discrepance between the fossils above and below a certain line.
Any motion of a rigid body can be reduced to a screw motion about a certain line, i.
If we take a certain line u as unit length, then the square on u is the unit of area, and the cube on u the unit of volume, that is to say, if we wish to measure a volume we have to determine how many unit cubes it contains.
The controversy was settled by also letting Missouri in as a slave State; but with the agreement that within all the remaining part of the purchase, north of a certain line, there should never be slavery.
In a word, to assign the value of one of the co-ordinates of a point in any system whatever, is always necessarily equivalent to determining a certain line on which that point must be situated.
As the desires are calculated to bring some gratification to ourselves, the Affections lead us to our relations to other men, and to a certain line of conduct which arises out of these relations.
Similar observations apply to the uniformity of moral distinctions, or the conviction of a certain line of conduct which man owes to his fellow-men.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "certain line" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
